Optimizing the Performance of Hybrid CPU Systems Based Upon the Thread Type of Applications to Be Run on the Cpus

1. A method for optimizing the performance of application programs in hybrid CPU systems having a plurality of different CPUs comprising: loading an application program into a hybrid CPU system; sampling said loaded application program, carried out as static analysis of the threads in the application program, to determine whether the application program is single threaded or multithreaded; running a multithreaded application program on a first CPU; running a single threaded application program on a second CPU, having the same performance capacity as the first CPU; wherein said second CPU is run at a higher speed than said first CPU in response to said carrying out of said static analysis; sampling the running application program to determine if the single or multithread type of the application has changed; and changing the CPU on which the application is being run responsive to a thread type change.

2. The method of claim 1 wherein the running speed of the second CPU is increased by increasing bus ratios in said second CPU.

3. The method of claim 1 wherein: said hybrid CPU system comprises a plurality of CPUs of the same performance capacity including said first and second CPUs; and further including reducing the speed of a CPU on which a multithreaded application program is run by reducing bus ratios in the CPU.

4. The method of claim 3 further including: predicting thermal power conditions of the hybrid CPU system; and reducing bus ratios in said CPU on which said multithreaded application is being run responsive to said monitoring.

5. A system for optimizing the performance of application programs in hybrid CPU systems having a plurality of different CPUs, said system comprising: a processor; and a computer memory holding computer program instructions which when executed by the processor perform the method comprising: loading an application program into a hybrid CPU system; sampling said loaded application program carried out as static analysis of the threads in the application program, to determine whether the application program is single threaded or multithreaded; running a multithreaded application program on a first CPU; running a single threaded application program on a second CPU, having the same performance capacity as the first CPU; wherein said second CPU is run at a higher speed than said first CPU in response to said carrying out of said static analysis; sampling the running application program to determine if the single or multithread type of the application has changed; and changing the CPU on which the application is being run responsive to a thread type change.

6. The system of claim 5 wherein the running speed of the second CPU is increased by increasing bus ratios in said second CPU.

7. The system of claim 5 wherein: said hybrid CPU system comprises a plurality of CPUs of the same performance capacity including said first and second CPUs; and said performed method further includes reducing the speed of a CPU on which a multithreaded application program is run by reducing bus ratios in the CPU.

8. The system of claim 7 , wherein said performed method further includes: predicting thermal power conditions of the hybrid CP J system; and reducing bus ratios in said CPU on which said multithreaded application is being run responsive to said monitoring.

9. A non-transitory computer usable storage medium having stored thereon a computer readable program for optimizing the performance of application programs in hybrid CPU systems having a plurality of different CPUs, wherein the computer readable program when executed on a computer causes the computer to: load an application program into a hybrid CPU system; sample said loaded application program, carried out as static analysis of the threads in the application program, to determine whether the application program is single threaded or multithreaded; run a multithreaded application program on a first CPU; run a single threaded application program on a second CPU, having the same performance capacity as the first CPU; wherein said second CPU is run at a higher speed than said first CPU, in response to said carrying out of said static analysis; sample the running application program to determine if the single or multithread type of the application has changed; and change the CPU on which the application is being run responsive to a thread type change.

10. The computer usable medium of claim 9 , wherein the running speed of the second CPU is increased by increasing bus ratios in said second CPU.

11. The computer usable medium of claim 9 wherein: said hybrid CPU system comprises a plurality of CPUs of the same performance capacity including said first and second CPUs; and the computer program when executed on a computer further causes the computer to reduce the speed of a CPU on which a multithreaded application program is run by reducing bus ratios in the CPU.

12. The computer usable medium of claim 11 , wherein said computer program when executed on a computer further causes the computer to: predict thermal power conditions of the hybrid CPU system; and reduce bus ratios in said CPU on which said multithreaded application is being run responsive to said monitoring.